Combined aspirator and force-pump



2 SHEETS-SHEET i.

B. SKIDMORL-JRA, AND EQF.y MCCARTHY. I COMBINED ASPlRATOR AND FORCE PUMP.

APPLICATION FILED AFR. 20, 1918.

livlpnmlllll-m Mlllllll COMBINED ASPIRATOR AND FORCE PUMP.

APPUCA'TION man APR.20,1918.

Patented Deo. 7, 1920.A

Ill/ grllllllllllllllllllllll111111111lll11111111111111111111!!!l v s 1 STATES PATENT OFFICE.

BENJAMINSKIDMORE, .IR., AND EDWARD MCCARTHY, or CHICAGO, ILLINOIS, ASSIGNORS To vACUUIvIIvIACHINERY CO., ACORPORATION or WISCONSIN..

COMBINED ASPIRATOR. AND FORCE-PUMP." p

To all/whom t may concern.' i

` Be it known that we, vBENJAMIN SKID.`

MORE, J r., and EDWARD 14. MCCARTHY, citi-A Zens of the United States, residing atChif.

cago, in the county of Cook and State of Illinois, have invented certainnew and useful Improvements in Combined Aspirators and Force-Pumps, of which the yfollowing is a specification. g

This invention` relates to improvements in combined aspirator and force pump adapted to produce and maintain a vacuum in-a chamber or passage by entrainment or suction ofthe fluid therefrom.

A further objectis to provide improved 'means for separating the gaseous'fluid from the liquid, the gaseous fluid being delivered to a Chamber or receptacle in` which the aspirator is arranged, while the 4liquid is de` livered to a force pump and by means of lwhich pump, the liquid is discharged or conveyed to the point of use.

To the attainment of these ends and the accomplishment of other new and usefulobjects as will appear, the invention consists in the features of novelty in substantially .the Construction, combination and arrangement of the several parts hereinafter more fully described and'claimedand shown in the accompanying drawings illustrating this invention and in which;

Figure 1 is a view partly in vertical section and partly in elevation of an improved apparatus of this character, constructed in accordancewith the principles of-this invention.

'Fig'. 2 is a view similar to Fig. -1 of a modi- Afied form of the invention.

Referring more particularly to the drawings, the numeral 1() designates generally a 'chamber or receptacle which -is supported .in any suitable manner such as by meansof legs 1l. and arranged within the receptacle preferably ata point adjacent the' bottom thereof, is an aspirator or'suctionv 'creating device. The aspirator comprises preferably spaced disks 12, 13, which are separated from each other by means of upright partitions 14C,

and the parts are secured together .in any Suitable manner, such as by means of suitable fastening devices. Two of these partitions 14 are preferably provided and are arranged -diametrically opposite each other, and this aspirator is connected with a shaft 15 in any the bottom ofthe receptacle.

y specification of Letters-raient. Patented De@l 7,' 19:30,l Application med Aprn 2o,- 1918. serial No. 229.671.

suitable manner so as to rotate therewith and the'shaft and aspirator may be supported by means of a suitable bearing comprising a Support 16and acollar 17 secured to the shaft and between which collar and support suitable antifrictioii balls or rollers 18 are' arranged. `The shaft is rotated by ,means of av sultable motor 19 mounted upon a suit- 'able support v2Ofajnda suitable flexible connection 2,1 is provided and forms a conne@ tion between the vshaft 15 and themotor shaft.

Depending from the `aspirator is a tubular element 22 which rotates in a suitable bearing 23 and extends through the bottom ofA the chamber or receptacle 10. A suitable packing 24 may be provided to forma fluid tight joint and the tubular element 22 has communication .with the end 25 of an inlet pipe 26, through which pipe 26 the gaseous fluid is entrained from a tank or receptacle 27 by means ofthe aspirator. The suction created in the tankor receptacle 27 is manifested inthe inlet pipe 28 and which pipel communicates with the chamber vor passageway 1n which it is desired to create a suction.

, -A check valve 29 may be provided in the pipe 26 so as to prevent the liquid 30 in the swirling in the chamber 10. Y. If desired a suitable overflow may be provided which leads from the tank or receptacle 10 and a cleanout plug vor valve 33 may also be provided in the receptacle 10 above the liquid level there- `in is an outlet 34 for the air or fluid which is delivered into the tank by the aspirator abovethe liquid level. .l

Connected withv the shaft 15 is a force pump, preferably of the centrifugal type and designated generally by the reference. numeral 35 and which force pump has an inlet opening 36 connected with. which is a pipe 37 leading from the tank or receptacle 27, preferably the bottom thereof.

1n the' form o`f the -invention shown in .'Fig. 1 the pump is preferablyarranged at Leading from a point above the afspiratoranda suitableV packing 38 may be provided for preventing the liquid 30 from entering thepump. The pump, is provided With an outlet pipe 39 which lpreferably leads to the outside of the tank or receptacle and is provided With a check valve'40. With this form ofv the invention, and when the aspirator is started,`-

a suction will be created in the'pipe 26, Which suctionjs manifested in the tank or receptacle 27 and also the passage 28 to entrain or draw the fluid through the passa ev '28 into the tank or receptacle 27.

same time thepump 35 Will also-draw air".

from the tank 27, but as the fluid passes into f Atte' the tank or receptacle, the liquid and'fluid will be separated, the liquid gravitating to the bottom of the tank Ito flow through the pipe 37 to the pump 35 .to be* discharged through the outlet pipe 39, andas the liquid flows' through this pipe 37, any air or lfluid which has accumulated or has been drawn into thepump will 'find its Wayback through the pipe 37 and through the liquid 'passing through the pipe into the tank or receptacle 27.l This fluid Will commingle With the fluid already in the tank or receptacle v -27 and Will be drawn therewith through the pipe 26 by the aspirator into the chamber 10 and` the uncondensed liuid will pass through ythe liquid to the top of the chamber 10 from where' it Will pass through the outsuitable housing 5() and Which housing suplet 34.

In the form of the invention shown in Fig. 2, the aspirator is arranged in a tank or chamber v41 which isfsuperposed above extends to the outside of the receptacle 42,

and may be provided with a checkvalve 48. The depending'tubular element 49 which is connected with the aspirator revolves ina ports a bearing 51 through Wliich'the shaft 43 passes land the housing 50,. together' with the` tubular elementj49 are -of an internal diameter considerably greater than the `di- Y ameter of the shaft 43. Leading from the vhousing 50 is a pipe 52, which is bent' to l form a goose neck 53, which extends into the tank or chamber 41l so that. the upper portion of the bend thereof normally .stands above the level of the liquid 30 in thetank or chamber 41'. The free extremity 54 of this\pipe terminates Within the tank or chamber 42 and a check va ve l55 may be. provided for closing the end of the pipe.

vThe tank or chamber 42 maybe provided with acleanout lor draw-off plug 56 andan inlet pipe 57 communicates with the tank or chamber 42 and Which inlet is connected With the chamber or-passage in which it is desired to create a suction and an overflow l leads from the tank or. chamber v41 and an outlet- 59 also leads thcrefromand through "Which outletthe air or fluid Which is de.

livered into the 'tank or receptacle 41 and vaccumulates above' the liquid level therein,

may pass.-

' .Winning form nf un, invention@ Win nn manifest that when -th'e aspirator is, operated and assuming -that there is no liquid' in the tank or chamber42, a suction Will be "created in the tank or chamber 42 through the pipe 52 and housing 50, and this suction Will be manifested in the passage 57. The.,

liquid and fluid Which is drawn into the :tank or chamber 42 through this pipe 57 Will be'separated andl the liquid Will gr-avi. ltate `to the'bottom of the tank or receptacle 42 While the `fluid lWill be drawn by the aspirator through the Lpipe52 andl delivered into the tank or chamber 41. The inlet of the pipe 52 is always maintained above the liquid level' in the tank' or chamber 42, and the liquid will accumulate in the latter until iti .rises above theinlet opening 46 of the pump 45,'atwhich time, the pump 45 will ,be primed andthe liquid Will be discharged by the pump through the pipe 47 past the valve 48 and conveyed to the point of use; 'Thus it Will be seen that the pump Will dis- 4 charge Athe liquid from the tank or chamber 42 Whenever any ofthe liquid accumulates therein.

By the provision ofv the goose, neck 53, it will be manifest that the pipe 52 Will be prevented from siphoning the liquid 3() from the tank orchamber 41 when the aspirator is not in operation.

l/Vhat is claimed new is:

1. The combination of a' chamber containing liquid, a rotary suction producing device submerged in the liquid within the chamber, a rotary pump, means for operating the suction creating device and pump, there being a suction passage through which gaseous fluid is drawn by the suction creating device, an outlet leading from the pump and through which outlet the liquid is discharged, and provisions for separating the liquid and gaseous fluid whereby they will.

ing .a suction 'passage through which gaseous fluid is drawn by thesuction creating device, an outlet leading trom the pumfp and through which outlet the' liquid is discharged, and means disposed between the4- suction ci'eatiiig device and pump, there be-A ing a passage through which gaseous t uid is drawn by the'sucti'on creating device, said passage embodying a separating chamber .in which the liquid is separated trom the gaseous tluid, said suction creating device andpuinp both having independent communication with the chamber whereby the liquid will be delivered directly to the pump and the` gaseous fluid will be delivered directly to the suction creating device, each independently with respect to the other, and a discharge outlet tor the pump. 4. The combination otl a chamber containing liquid, a rotary suction creating device submerged in theliquid within the chainber, a pump.` means for actuating the suetion creating device andpuinp, there being a passage through which gaseous fluid is drawn by the suetionfcreating device, said passage embodying a separa-ting chamber in which the gaseousl fluid is separated from, the liquid, said suction' creating device and pump both having independent communication with the chamber'whereby the .liquid will".be delivered directly-.tothe pump and the gaseous fluid williI bey delivered directly tol the vsuction creating device, each .independently with -respect to the-other, a dischargel outlet forlthe pump, said suction' creating device'beingf submerged, andA an operating shaft-common to the suction de-` vice and pump. r Y,

The combination or' a chamber con:

taining liquid, a rotary suction creating de- '.-vice submerged in .the4 liquid within the chamber, a pump, .means for actuating the suction creating 'device and pump, there being a passage through .which .gaseous Il'luid and liquid aredrawnby the suction creating device, said passage embodying a separating chamber. the inietof the suction creating device having communication with said separating chamber above the liquid level .in the separating chamber, the inlet of said pump also having communication with .said separating chamber, whereby the suction creating device will receive the gaseous tluidfrom the separating chamber -at'ter the liquid has been separated therefrom, and a dischargethe liquid level in the chamber, there beinga passage through which liquid and gaseous tluid 'are drawn by tlieI suction creating device, said passagev embodying a. separating chamber, the inlet olf the, said suction creating device and pump both having communication with the' chamber indepcndently ot` each other, the inlet of the suction creating device being disposed above the liquid level in the said lseparating chamber, means for operating the pump and suction creating device, and a discharge outlet leading from the pump to the outside ot the lirst said chamber.

7. rl`he combination ot' a chamber containing liquid, a rotary suction'creating device submerged in the liquid within the chamber, a pump also within the chamber, the inlet of the pump being disposed abovethe liquid level in the chainber; there being a passage through which-liquid and gaseous iiuidare drawn by the suction creating device, said passage en'ibodying a separating chamber,

the inlets otl the said suction creating device 'and pump both having communication with the chamber independently ot' each other, the inlet ot' the suction creating device being disposed. above the liquid level inthe said separating chamber, means t'or operating vthe pump and suction .creating device, and a -discharge outlet leading from the pump to the outside of the first said chamber, the said -operating means embodying a shaft common -to the suction'creating device and pump, vsaid suction creating'device :and pump being superposed.

.8. The combina-tion ot 'a chamber con- 2 taining liquid,a rotary suction creating device submerged in the liquid within the chamber, a. pump'also within the chamber, the inlet fot' the pump being disposed above the liquid level in 4the chamber, there being a passage throughwvhich liquid and gaseous i fluid are-drawi'ib'v the 'suction creating device. said passage embodying a separating chamber. the inlets o't'the said suction creating device and pump both having communication with the chamber independently oi."v

each other, liquid tro'm said separating vchamber being. supplied to the pump through the inlet thereotI by gravity.

In testimony whereotl we have signed our names to this specification on 4this 16th day ot' April, A. `l).'1918.

nryJauiN siiinuonn, JR. EDWARD r; MCCARTHY. 

